Just to add to my illustrious compadre's comments, you would have a chance at recovery if you had a memory card installed in the tablet.
I'm not sure if doing that actually generates a drive letter and I don't want to try it myself as I hate the way my phone adds lots of unnecessary stuff to an SD card, but at the very least you could remove a memory card and plug in into a computer either directly or via a USB adaptor.
If you're not using a removable memory card then maybe something to think about if you save important stuff to your tablet. They can be configured to save files to a memory card instead of internal memory.